; 待完成
assume cs:code, ds: data

data segment
    db 'welcome to masm!'
data ends

code segment
    start:
        mov ax, 0b800h
        mov ds, ax
        mov ax, 0241h
        mov ds:[0], ax
        mov ax, 0242h
        mov ds:[2], ax
        mov ax, 0243h
        mov ds:[4], ax

    mov ax, 4c00h
    int 21h
code ends
end start